Photodissociation of singly protonated peptides at 193 nm investigated with tandem time-of-flight mass spectrometry |
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Authors: | Moon Jeong Hee Yoon So Hee Kim Myung Soo |
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Institution: | National Creative Research Initiative Center for Control of Reaction Dynamics and School of Chemistry, Seoul National University, Seoul 151-742, Korea. |
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Abstract: | Photodissociation at 193 nm of some singly protonated peptides generated by matrix-assisted laser desorption/ionization was investigated using tandem time-of-flight mass spectrometry. For peptides with arginine at the C-terminus, x, upsilon, and w fragment ions were generated preferentially while a and d fragment ions dominated for peptides with arginine at the N-terminus. These are the same characteristics as photodissociation at 157 nm reported previously. Overall, the photodissociation spectra obtained at 157 and 193 nm were strikingly similar. |
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